BOINC Terminology: I

Initial Replication - When a work unit is split into results to crunch, the result is divided over (usually) 2 or more hostIDs. This dividing of the result is called initial replication. It is needed to get to the quorum.

Intel - A CPU producing company.

Invalid - Is an error message on the project's website for a result. For some reason it got to be invalid. Reasons can be that it can't reach quorum, your result crashed etc.